Titanium(IV) oxide having a copper co-catalyst: a new type of semihydrogenation photocatalyst working efficiently at an elevated temperature under hydrogen-free and poison-free conditions
Titanium(IV) oxide having a copper co-catalyst: a new type of semihydrogenation photocatalyst working efficiently at an elevated temperature under hydrogen-free and poison-free conditions
复制标题
具有铜助催化剂的氧化钛（IV）：一种新型半氢化光催化剂，在无氢无毒条件下在高温下高效工作
DOI：
10.1039/c8cp02316f
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发表时间：
2018
影响因子：
3.3
通讯作者：
Hiroshi Kominami， Misaki Shiba， Akimi Hashimoto，a Shota Imai， Kousuke Nakanishi， Atsuhiro Tanaka， Keiji Hashimoto and Kazuya Imamura
中科院分区：
文献类型：
--
作者：
Imamura Kazuya;Miyahara Shin-ichiro;Kawano Yukiko;Sato Katsutoshi;Nakasaka Yuta;Nagaoka Katsutoshi;Kazuya Imamura， Hiroko Kato， Yuichiro Wada，b Kazuhiro Makabe， Ayumu Onda， Atsuhiro Tanaka， Hiroshi Kominami， Katsutoshi Satobd and Katsutoshi Nagaoka;Hiroshi Kominami， Misaki Shiba， Akimi Hashimoto，a Shota Imai， Kousuke Nakanishi， Atsuhiro Tanaka， Keiji Hashimoto and Kazuya Imamura
在无氢无毒条件下，298 K时，载铜氧化钛光催化剂对醇溶液中的炔烃加氢反应具有良好的选择性。反应温度稍微升高到323 K大大提高了反应速率，同时保持了选择性并抑制了H2副产物的形成。测定了4-辛炔半氢化的表观活化能为54 kJ mol−1，表明该光催化反应的速率控制步骤不是电子产生过程，而是光照射下的热催化氢化过程。
A copper-loaded titanium(IV) oxide photocatalyst exhibited perfect selectivity in hydrogenation of alkynes to alkenes in an alcohol solution at 298 K under hydrogen-free and poison-free conditions. A slight elevation in the reaction temperature to 323 K greatly increased the reaction rate with the selectivity being preserved and the formation of an H2 by-product being suppressed. The apparent activation energy of 4-octyne semihydrogenation was determined to be 54 kJ mol−1, indicating that the rate determining step of this photocatalytic reaction was not an electron production process but a thermocatalytic hydrogenation process under light irradiation.